System and method for recognizing traffic stagnation for vehicle
First Claim
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1. A system for recognizing a traffic stagnation state for a vehicle, comprising:
- first means for deriving a vehicle speed;
second means for deriving a vehicle acceleration which the vehicle is subjected to;
third means for deriving a vehicle acceleration which the vehicle is subject to; and
fourth means for deriving a vehicle running pattern on the basis of the vehicle speed, vehicle acceleration, and vehicle deceleration and determining whether or not the vehicle running pattern derived substantially coincides with a running pattern peculiar to a traffic stagnation state in which the vehicle runs in the traffic stagnation,wherein the fourth means includes;
fifth means for outputting a first signal when a magnitude of the acceleration derived is below a first predetermined value;
sixth means for outputting a second signal when a magnitude of the acceleration derived is below a second predetermined value; and
seventh means for determining whether or not a frequency of alternating repetitions of the outputs of the first and second signals exceeds a third predetermined value and recognizing that the vehicle runs in the traffic stagnation state upon determining that the frequency exceeds the third predetermined value.
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Abstract
A system and method for recognizing a stagnation state for a vehicle are disclosed in which a running characteristic pattern of the vehicle is derived on the basis of running parameters such as the vehicle speed, acceleration of the vehicle, and deceleration of the vehicle, and whether the running characteristic pattern substantially coincides with a running characteristic pattern peculiar to a state in which the vehicle runs in the stagnation state.
15 Citations
19 Claims
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1. A system for recognizing a traffic stagnation state for a vehicle, comprising:
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first means for deriving a vehicle speed; second means for deriving a vehicle acceleration which the vehicle is subjected to; third means for deriving a vehicle acceleration which the vehicle is subject to; and fourth means for deriving a vehicle running pattern on the basis of the vehicle speed, vehicle acceleration, and vehicle deceleration and determining whether or not the vehicle running pattern derived substantially coincides with a running pattern peculiar to a traffic stagnation state in which the vehicle runs in the traffic stagnation, wherein the fourth means includes; fifth means for outputting a first signal when a magnitude of the acceleration derived is below a first predetermined value; sixth means for outputting a second signal when a magnitude of the acceleration derived is below a second predetermined value; and seventh means for determining whether or not a frequency of alternating repetitions of the outputs of the first and second signals exceeds a third predetermined value and recognizing that the vehicle runs in the traffic stagnation state upon determining that the frequency exceeds the third predetermined value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A system for recognizing a traffic stagnation state for a vehicle, comprising:
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first means for detecting a vehicle speed of the vehicle; second means for deriving a vehicle acceleration which the vehicle is subjected to; third means for deriving a vehicle deceleration which the vehicle is subject to; and fourth means for deriving a vehicle running pattern on the basis of the vehicle speed, vehicle acceleration and vehicle deceleration and determining whether or not the vehicle running pattern derived substantially coincides with a running pattern peculiar to a traffic stagnation state in which the vehicle runs in the traffic stagnation, wherein the second means derives an operating variable of an accelerator of the vehicle and wherein the fourth means includes; fifth means for deriving an estimated arrival vehicle speed defined as the vehicle speed at which the vehicle speed would arrive according to the operating variable of the accelerator; sixth means in response to the presence of the vehicle deceleration derived by the third means for comparing the detected vehicle speed with the estimated arrival vehicle speed and outputting an acceleration halt signal when the detected vehicle speed is below the estimated arrival vehicle speed; and seventh means for recognizing that the vehicle runs in the stagnation state when a frequency of the outputted acceleration half signal exceeds a predetermined number. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A method of recognizing whether a motor vehicle runs in traffic stagnation state or not, the motor vehicle including an engine, an accelerator pedal operatively associated with the engine, and a brake pedal, the method comprising the steps of:
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detecting a variable indicative of a magnitude of depression of the accelerator pedal and generating an accelerator pedal depression signal indicative of said variable detected; determining whether said accelerator pedal depression signal is less than a predetermined accelerator pedal depression value or not; detecting deceleration demand on the motor vehicle and generating a deceleration demand signal indicative of said deceleration demand detected; determining whether deceleration demand signal is less than a predetermined deceleration demand value or not after it has been determined that said accelerator pedal depression signal is less than said predetermined acceleration pedal depression value; incrementing a counter when it is determined that said deceleration demand signal is less that said predetermined deceleration demand value after it has been determined that said acceleration pedal depression signal is less than said predetermined acceleration pedal depression value; and recognizing that the motor vehicle is in the traffic stagnation state when a content of said counter exceeds a predetermined number.
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17. A method of recognizing whether a motor vehicle runs in a traffic stagnation state or not, the motor vehicle including an engine, an accelerator pedal operatively associated with the engine, and a brake pedal, the method comprising the steps of:
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detecting a variable indicative of a magnitude of depression of the accelerator pedal and generating an accelerator pedal depression signal indicative of said variable detected; detecting a vehicle speed of the motor vehicle and generating a vehicle speed signal indicative of said vehicle speed detected; determining an estimated arrival vehicle speed for said accelerator pedal depression signal; detecting a deceleration demand on the motor vehicle and generating a deceleration demand signal indicative of said deceleration demand detected; determining whether said deceleration demand signal is generated before said vehicle speed signal arrives at said estimated arrival vehicle speed or not; incrementing a counter when it has been determined that said deceleration demand signal is generated before said vehicle speed signal arrives at said estimated arrival vehicle speed; and recognizing that the motor vehicle is in the traffic stagnation state when a content of said counter exceeds a predetermined number.
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18. A system for recognizing whether a motor vehicle runs in a traffic stagnation state or not, the motor vehicle including an engine, an accelerator pedal operatively associated with the engine, and a brake pedal, the system comprising:
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means for detecting a variable indicative of a magnitude of depressing of the accelerator pedal and generating an accelerator pedal depression signal indicative of said variable detected; means for determining whether said accelerator pedal depression signal is less than a predetermined accelerator pedal depression value or not; means for detecting a deceleration demand on the motor vehicle and generating a deceleration demand signal indicative of said deceleration demand detected; means for determining whether said deceleration demand signal is less than a predetermined deceleration demand value or not after it has been determined that said accelerator pedal depression signal is less than said predetermined acceleration pedal depression value; means for incrementing a counter when it is determined that said deceleration demand signal is less that said predetermined deceleration demand value after it has been determined that said acceleration pedal depression signal is less than said predetermined acceleration pedal depression value; and means for recognizing that the motor vehicle is in the traffic stagnation state when a content of said counter exceeds a predetermined number.
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19. A system for recognizing whether a motor vehicle runs in a traffic stagnation state or not, the motor vehicle including an engine, an accelerator pedal operatively associated with the engine, and a brake pedal, the system comprising:
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means for detecting a variable indicative of a magnitude of depressing of the accelerator pedal and generating an accelerator pedal depression signal indicative of said variable detected; means for detecting a vehicle speed of the motor vehicle and generating a vehicle speed signal indicative of said vehicle speed detected; means for determining an estimated arrival vehicle speed for said accelerator pedal depression signal; means for detecting a deceleration demand on the motor vehicle and generating a deceleration demand signal indicative of said deceleration demand detected; means for determining whether said deceleration demand signal is generated before said vehicle speed signal arrives at said estimated arrival vehicle speed or not; means for incrementing a counter when it has been determined that said deceleration demand signal is generated before said vehicle speed signal arrives at said estimated arrival vehicle speed; and means for recognizing that the motor vehicle is in the traffic stagnation state when a content of said counter exceeds a predetermined number.
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Specification